The US government's official stance on the spreading drones is that "there is no evidence they pose a threat." So, are they telling the truth, or, is the statement carefully worded to only be true about the drones themselves?
This market will resolve to YES if one hundred or more people are killed in an incident related to the "drones." Such disasters may include:
The drones themselves deploy weapons and kill people
The drones are searching for something bad that causes casualties
The drones are from an adversary who declares war or they cause retaliation
The drones create panic and riots
Otherwise, if time expires, it will resolve to NO.
Sad to have to ask, but @SteveSokolowski how'd you resolve in case of an aviation accident not caused by the drones, but by people interfering (pointing lasers, shooting guns at them etc.) with aircraft they believe to be drones?